<template>
  <div class="roles">
       <!-- 面包屑区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
        <el-row>
            <el-row>
                <el-button>添加角色</el-button>
            </el-row>
        </el-row>

    <!-- 角色列表区域 -->
    <el-table :data="rolesList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
            <template slot-scope="scope">
                <el-row  :class="['bdbottom',i1 === 0 ? 'bdtop' : '','vcenter']" v-for="(item1 , i1) in scope.row.children" :key="item1.id">
                    <!-- 渲染一级权限 -->
                    <el-col :span="5">
                        <el-tag closable
                                @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                        <i class="el-icon-caret-right"></i>
                    </el-col>
                    <!-- 渲染二级和三级权限 -->
                    <el-col :span="19">
                        <!-- 通过for循环嵌套渲染二级权限 -->
                        <el-row  :class="[i2 === 0 ? '' : 'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                            <el-col :span="6">
                                <el-tag 
                                type="success"
                                closable
                                @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i> 
                            </el-col>
                            <el-col :span="18">
                                <el-tag 
                                type="warning" 
                                v-for="(item3,i3) in item2.children" 
                                :key="item3.id"
                                closable
                                @close="removeRightById(scope.row,item3.id)">
                                    {{item3.authName}}
                                </el-tag>
                            </el-col>
                        </el-row>
                    </el-col>
                </el-row>
                <!-- {{scope.row}} -->
            </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label='角色名称' prop="roleName"></el-table-column>
        <el-table-column label='角色描述' prop="roleDesc"></el-table-column>
        <el-table-column label='操作'>
            <template slot-scope="scope">
                <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
                <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
                <el-button type="warning" icon="el-icon-setting" size="mini"
                @click="showSetRightDialog(scope.row)">分配权限</el-button>
            </template>
        </el-table-column>
    </el-table>
    </el-card>
    <!-- 分配权限的对话框 -->
    <el-dialog
        title="分配权限"
        :visible.sync="setRightDialogVisible"
        width="50%"
        @close='setRightDialogClosed'>
        <!-- 树形控件 -->
        <el-tree :data="rightsList" 
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"></el-tree>
        <span slot="footer" class="dialog-footer">
          <el-button @click="setRightDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="allowRights">确 定</el-button>
        </span>
    </el-dialog>

    
  </div>
</template>

<script>
export default {
  components: {},
  props: {},
  data() {
    return {
        // 所有角色列表数据
        rolesList:[],
        // 控制分配权限对话框的显示与隐藏
        setRightDialogVisible:false,
        // 所有权限数据
        rightsList:[],
        // 树形控件的属性绑定对象
         treeProps: {
          children: 'children',
          label: 'authName'
        },
        // 默认选中的节点ID值
        defKeys:[],
        // 当前即将分配权限的角色ID
        roleId:'',
    };
  },
  watch: {},
  computed: {},
  methods: {
      async getRolesList() {
        const {data:res} = await this.$http.get('roles')
        if (res.meta.status !==200) {
            return this.$message.error('获取角色列表失败！')
        }
        this.rolesList=res.data
        // console.log(this.rolesList);
      },
    //   根据id点击删除权限
    async removeRightById(role,rightId) {
        // 弹框提示用户是否删除
        const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err=>err     
        );

        if (confirmResult !=='confirm') {
            return this.$message.info('取消了删除')
        }
        // console.log('确认了删除');
       const {data:res}= await this.$http.delete('roles/'+role.id+'/rights/'+rightId)
       if (res.meta.status !==200) {
           return this.$message.error('删除权限失败')
       }
    //    this.getRolesList()不建议全页面赋值渲染
    role.children=res.data
       this.$message.success('删除权限成功')
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
        this.roleId=role.id
        // 获取所有权限数据
        const {data:res}=await this.$http.get('rights/tree')
        
        // console.log(res);
        if (res.meta.status !==200 ) {
            return this.$message.error('获取权限数据失败！')
        }

        // 把获取到的全线数据保存到data中
        this.rightsList=res.data
        // 递归获取三级节点的ID
        this.getLeafKeys(role,this.defKeys)
        this.setRightDialogVisible=true
    },
    // 通过递归形式获取角色下所有三级权限的id，并保存在defkeys数组中
    getLeafKeys(node,arr) {
        // 如果当前node不包含children属性，则是三级节点
        if (!node.children) {
            return arr.push(node.id)
        }
        node.children.forEach(item=>{
            this.getLeafKeys(item,arr)
        })
    },
    // 监听分配权限对话框的关闭权限，清空defkeys
    setRightDialogClosed() {
        this.defKeys=[]
    },
    // 点击为角色分配权限
    async allowRights() {
        const keys=[
            ...this.$refs.treeRef.getCheckedKeys(),
            ...this.$refs.treeRef.getHalfCheckedKeys()
        ]

        // console.log(keys);
        const idStr=keys.join(',')
        // console.log(idStr);
        const {data:res}=await this.$http.post('roles/' +this.roleId +'/rights',{rids:idStr})
        if (res.meta.status !==200) {
            return this.$message.error('分配权限失败！')
        }
        this.$message.success('分配权限成功!')
        this.getRolesList()
        this.setRightDialogVisible=false
    }
  },
  created() {
      this.getRolesList()
  },
  mounted() {}
};
</script>
<style  scoped>
.el-tag {
    margin: 7px;
}

.bdtop{
    border-top: 1px solid #eee;
}

.bdbottom{
     border-top: 1px solid #eee;
}

.vcenter{
    display: flex;
    align-items: center;
}
</style>